This is a common apologetic in Christianity. It isn't true.
Yahweh started out as a warrior deity as well. In Exodus he fought a sea monster.
The theme Yahweh-is-a-Warrior is present in all sections of the canonóTorah, Prophets,
and Writings:
Exodus 15:3:
Yahweh is a man of war;
Yahweh is his name.
Isaiah 42:13:
Yahweh goes forth like a mighty man;
like a man of war(s) he stirs up his fury.
Zephaniah 3:17: Yahweh, your God, is in your midst,
a warrior who gives victory.
Psalm 24:8:
Who is the King of Glory?
Yahweh, strong and mighty;
Yahweh, mighty in battle.
In these passages Yahweh is explicitly called a warrior or directly compared to a warrior. If one
moves out from simple designations to actual functioning, the metaphor or image is even more
extensively present. Yahweh is the subject of many verbs that belong to the sphere of war
In Psalms and Exodus people began making statements about Yahweh - "Oh Lord God of Israel, there is no God like you in heaven above or Earth below" Kings 8;23
But this was also done with Zeus, it's called divine incomparability because the God cannot be compared to anything.
Zeus, Ancient Near Eastern Notions of Divine Incomparability, and Similes in the Homeric Epics (Classical Antiquity 2012) -
Zeus, Ancient Near Eastern Notions of Divine Incomparability, and Similes in the HomericEpicsAuthor(s): Jonathan L.
It's known that one Egyptian God may have been the first to be supreme -
Amun-Ra, a God known to the Egyptians as titles such as the “Supreme God” was truly someone who Egyptians dare not offend. Symbolized by the ram expressing fertility and war, two powerful forces that both create and end humans.
DUring the Middle Ages theologians like Aquinas advanced concepts of Yahweh by adding Platonic ideas. Tri-omni and concepts of The One were borrowed for the CHristian God.
His concept of 'the One' is
equivalent to 'the Good' because it describes an ultimate ontological truth. 'The One' is both 'uncaused' and the cause of being for everything else in the universe. Plotinus compared his principle of 'the One' to an illuminating light, as Plato did with the Form of the Good.
Francesca Stavrakopoulou Professor of Hebrew Bible and Ancient Religion at the University of Exeter has a new book about Yahwehs body in the OT. So yes he had a body and would physically appear for people.
So Yahweh did have a material form. Enough descriptions to write an entire book.
When did Yahweh become supreme? Same time as all the mystery religions, when they were local religions with national Gods (Yahweh was the God if Israel) and were then Hellenized. One of the changes was -
"
-Other deities, who had previously been associated with national destiny (
e.g., Zeus, Yahweh, and Isis), were raised to the status of
transcendent, supreme"
Hellenistic religion - Beliefs, practices, and institutions